/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.opentoast.maven;

import java.util.List;
import java.util.jar.Attributes;
import java.util.jar.Manifest;

import org.apache.maven.model.Dependency;
import org.apache.maven.project.MavenProject;

import aQute.lib.osgi.Analyzer;

/**
 * TODO Use SpringSource Bundlor to generate MANEFEST.MF file
 * 
 * @author <a href="mailto:jiwhiz@gmail.com">Yuan Ji</a>
 *
 */
public class BundleManifestWriter extends AbstractManifestWriter
{
    /**
     * Create a manifest contaigning the required classpath.
     * 
     * @return the newly created manifest
     */
    protected Manifest createNewManifest()
    {
        Manifest manifest = new Manifest();
        Attributes attributes = manifest.getMainAttributes();
        
        //set Jar manifest headers
        attributes.put( Attributes.Name.MANIFEST_VERSION, "1.0" );
        
        //set osgi manifest headers
        attributes.putValue(Analyzer.BUNDLE_MANIFESTVERSION, "2"); //OSGi 4.x
        attributes.putValue(Analyzer.BUNDLE_SYMBOLICNAME, project.getArtifactId());
        attributes.putValue(Analyzer.BUNDLE_VERSION, project.getVersion());
        attributes.putValue(Analyzer.BUNDLE_NAME, project.getName());
        attributes.putValue(Analyzer.BUNDLE_DESCRIPTION, project.getDescription());
        
        //set s2dm Import-Bundle with all dependent bundles
        setImportBundles(attributes, project);

        return manifest;
    }

    @SuppressWarnings("unchecked")
    private void setImportBundles(Attributes attributes, MavenProject project)
    {
        //load Import-Bundle from plugin config
        StringBuffer importBundleSB = new StringBuffer();
        
        // go through all project dependencies, and add each bundle type dependency to Import-Bundle
        List<Dependency> deps = (List<Dependency>)project.getDependencies();
        for (Dependency dependency : deps){
            if ("provided".equals(dependency.getScope())){
                if (importBundleSB.length() > 0){
                    importBundleSB.append(",");
                }
                importBundleSB.append(dependency.getArtifactId());
                importBundleSB.append(";version=\"[");
                importBundleSB.append(dependency.getVersion());
                importBundleSB.append(",");
                importBundleSB.append(dependency.getVersion());
                importBundleSB.append("]\"");
            }
        }
        
        if (importBundleSB.length() > 0){
            attributes.putValue("Import-Bundle", importBundleSB.toString());
        }
        
        
    }

}
